AT211781B - Process for dyeing with highly disperse vat dye pigments - Google Patents

Description

  

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  Process for dyeing with highly disperse vat dye pigments
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 contains hydrosulphite.



   Immediately afterwards it is steamed for 30 seconds in a high-speed steamer at 102-1050 C, the goods are then rinsed, oxidized and soaped. The fabric is dyed completely the same on the top and bottom as well as in the cross section.



   If you work as stated above but without the addition of the ammonium salt of dodecylbenzenesulfonic acid, the dye pigment migrates during the intermediate drying from the fabric parts not lying on the drying drum to the parts in contact with the drum, and one then obtains a further processing according to the present example two-sided coloring.



   If, in this example, the same amount of the sodium salt of dioctylbenzenesulfonic acid is used instead of the ammonium salt of dodecylbenzenesulfonic acid, a similarly favorable result is obtained. Monochloroacetic acid can be replaced by ß-chloropropionic acid with the same success.



     Example 2: 1000 m of a cellulose fabric, which has denser and thinner areas from the production, is placed on a pad or a similar impregnation device at 50 C on a dye
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    The following composition was padded: 0.40 kg of the sodium salt of oxystearic acid N-ethylanilide sulfonic acid ester + water
300.00 kg
Squeeze effect: 70%; Throughput speed of the goods: 50 m / min.



   The goods are then dried in a hot flue. There is no migration of the dye pigment at all.



   The dyed material is now allowed to run through a liquor containing sodium hydroxide solution and hydrosulfite as in Example 1, and it is finished in the same way as described there. The result is a fabric that is dyed completely the same.



   A similarly favorable result is obtained if, in the above example, instead of the sodium
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 Ren alkyl sulfonate used.



   Without the addition of the sodium salt of oxystearic acid-N-ethylanilide-sulfonic acid ester or the alkyl sulfonate during the padding, the dye migrates in the course of the intermediate drying to a considerable extent from the slower drying, denser parts of the fabric to the faster drying thinner parts of the goods, which results in considerable differences in thickness during further processing occur in the coloring of the individual tissue areas.



   Example 3: 100 kg of cotton in a liquor ratio of 1:15 are treated with the following pigment liquor on a Krenz spool dyeing machine:
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Dye tables in the finest dispersion
2.50 kg of formic acid
0.76 kg of the ammonium salt of dodecylbenzenesulfonic acid 30.00 kg of Glauber's salt calc.



    + Water
1500.00 kg
The pigmentation is started at 30 C and the temperature is increased to 700 C within 20 minutes. The liquor is then allowed to circulate for about 15-20 minutes at 700 ° C. until the bath is completely drawn out.



   271 sodium hydroxide solution 38 Bé and 6 kg sodium hydrosulfite are now added to the exhausted pigment liquor and the coloring process is completed for a further 20 minutes. The result is a completely level coloring.



   If one works in the above example without the addition of the ammonium salt of dodecylbene sulfonic acid, the pigmentation liquor cannot be completely exhausted. Will the reduction and fixation

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    Pigment, the necessary amounts of caustic soda and hydrosulfite are added, then PATENT CLAIMS:
1. Process for dyeing with highly disperse vat dye pigments after pigment dyeing or.



    Pigment pad steaming process, characterized in that acids, in particular organic acids and those anionic, surface-active substances which have a hydrocarbon radical with at least 6 carbon atoms in the chain, which can also be closed to form a maximum of one ring, are added to the dye or padding liquors , contain.

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Claims (1)

2. The method according spoke 1, characterized in that the acids used are non-volatile organic acids ** WARNING ** End of CLMS field may overlap beginning of DESC **.